Unable to change key figure type on model XXX

Hi Experts,

I am looking for a way to change Key Figure Length from normal to large. It keeps rejecting my request with an error message, Unable to change key figure type on model XXX. I have tried to change it on copied application and by creating new one. But both, it says same message.

We have several models in the environment, and would like to change one of them from normal to large. Is there way to make this happen? Or let me know why it keeps happening even there is a selection to go normal to large. Any global setting on it?

Thanks in advance,

YH Seo